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Question on using an off-axis filter

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#1 Special Ed

Special Ed

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Posted 10 January 2017 - 08:43 AM

Hi,

 

I just bought an off-axis solar filter for my C14.  Because I've never used an off-axis filter before, I was wondering if it matters where the filter is positioned e.g., if the objective was a clock face, would it be better to have the filter at 12 o'clock or 4 o'clock or 9 o'clock or is there no difference.

 

The filter is from Astrozap and has a very nice anodized aluminum body with the filter portion covered with Baader Astrosolar film.  The filter opening is ~4.5 inches (114mm).

 

In case you're wondering, the sunspot number has been zero for the last six days (naturally).

 

Thanks.



#2 Special Ed

Special Ed

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Posted 11 January 2017 - 11:27 AM

Guess nobody knows.  I'll try posting in the Solar Observing forum.




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